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31-70251 — Amphenol product photo
Amphenol

Amphenol RF 31-70251 Mini BNC Plug, 75 Ohm, 4 GHz, Crimp

MPN31-70251
Active

Amphenol RF mini BNC plug, male pin, 75 Ohm, 4 GHz, 500 mating cycles, crimp termination, nickel body, gold center contact, includes connector + contact + ferrule.

$11.7800Ref. price · indicative, final on quote
StockContact for availability
MOQ1 pcs
  • New & original stockTraceable channels only — no mixed lots, no re-taped reels.
  • Factory packaging where availableSealed reels, trays and bags; cut quantities always stated on the quote.
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Specifications

31-70251 Technical Specifications
ParameterValue
Mounting typeFree Hanging (In-Line)
Connector typePlug, Male Pin
Fastening typeBayonet Lock
Voltage rating500 V
Frequency - max4 GHz
Cable groupAT&T 735, 735A, Belden 735A1
Operating temperature-40°C~85°C
Body materialBrass
Housing colorSilver
Dielectric materialPolytetrafluoroethylene (PTFE)
Center contact materialBrass
PackageBulk
Includes3 pcs - 1 Connector, 1 Contact, 1 Ferrule
Impedance75Ohm
Body finishNickel
Mating cycles500
Insertion loss0.1dB
Number of ports1
Shield terminationCrimp
Contact terminationCrimp
Center contact platingGold

Product details

Mini BNC Plug for 75 Ohm Cable Runs

The 31-70251: It terminates cables in the AT&T 735, 735A, and Belden 735A1 groups using a crimp-on shield termination and a separate crimp ferrule.

RF Performance and Bandwidth Ceiling

This connector is designed for 75 Ohm cable and equipment.

The listed cable group — AT&T 735, 735A, and Belden 735A1 — is a specific 75 Ohm series. If your reel holds a different 75 Ohm variant, check the cable OD against the ferrule ID before committing; the crimp die and ferrule are sized to this cable group.

Mating and Mechanical Life

Bayonet lock coupling with 500 mating cycles — typical for a mini BNC that sees occasional disconnect in a patch panel or field deployment. The PTFE dielectric holds the center contact concentric through repeated mates, keeping the impedance step at the interface within spec.

Frequently asked questions

What is the impedance of 31-70251?

Buyers need to verify impedance matches their system requirements, especially when replacing or designing with 75-ohm components.

Where can I buy 31-70251?

Transactional intent from engineers and buyers ready to purchase; knowing stock and distributors speeds procurement.

Is 31-70251 a BNC connector?

Clarifying connector type avoids ordering the wrong form factor (bayonet lock is typical for BNC but not explicitly stated).

What is the replacement for 31-70251?

Maintenance techs and buyers need to know if this part is obsolete or if an alternative exists with the same specs.

What cable group does 31-70251 support?

Ensures compatibility with existing cable stock; wrong cable group leads to poor signal integrity or mechanical mismatch.

How much does 31-70251 cost?

Budget and cost comparison critical for bulk buying or BOM pricing.